How do I make a giant clock made of many small clocks?
Here is the simple scene that I made using animation nodes:



I made 2 arrows, and duplicated it 5*8 times:





Each arrow is sent to the node program, which determines the position in the space and the rotation:



First, I divided the index by 5 and took the remainder of the division to get the coordinates (x and y index) of the arrow:



Next, I just multiplied it to get the correct scale of the arrow's matrix (x and y coordinates): 



How to get the rotation? First, I wrote a map, which determines the rotation of each arrow. I made it using a list of "box symbols" ("┌","─","┐", etc..):

┌───┐
│┌──┘
││    
│└──┐
│┌─┐│
││ ││
│└─┘│
└───┘


Then I wrote the script, which converts a correct symbol into 2 angles:

out=[0,0]
if(letter=="┌"):
    out=[-90,180]
if(letter=="─"):
    out=[-90,90]
if(letter=="│"):
    out=[0,180]
if(letter=="┐"):
    out=[180,90]    
if(letter=="┘"):
    out=[0,90]      
if(letter=="└"):
    out=[0,-90]  

rot=out[arrow] 


So when I put the correct letter and arrow index (0 or 1 - first or second arrow) it outputs the correct angle:



This script block gets the letter from the text "map":



and finally I used the animate float node to make a transition between a random angle and that angle:



As you see, you need to know a little about Animation nodes and scripting. This is the file (NOTE: it will not work without Animation Nodes!):